I've a new bike with DT Swiss M1900 wheels with 30mm rims paired with 2.6" tyres running tubeless with original fitted DT tape and stans sealant
Having done a week in/around Bourg St Maurice its been burping rather too often. 2.6" maxxis minion exo front I've burped and also 2.6" Schwalbe NN apex [blows up rather smaller] has been burping also. Perhaps I've been running them quite soft, but they've not been taking all that much to burp. Running them rather hard results in a large tyre without much give, rather defeating the point of 2.6"
In my previous experience of Stans ArchEX 26" I've largely never had a burping problem. Usually on 2.35" Schwalbe and stans tape/sealant running on the softer side (but not stupid soft). Only the usual tyre pings as it unseats and jumps straight back on (not burping), and post dinging a rim (running a tube) it burped on an off camber
I've heard its the case for hope rims to routinely burp air, and early tubeless DT Swiss, but is this normal for current DT swiss?
Should I be considering re-rimming for Stans Flow mk3's?
Or swapping out for 2.4" tyres perhaps?
Tubeless Ready tyres?
Got no problem with my M1900, but it's the 25mm. Though wider rims seem to hold on to tyres in my experience, or at least they're a right git to get them off.
Or too low pressure for you and/or your bike's weight perhaps. I run mine around 20 to 25psi, but it will depend on weight really, plus maybe the nature of riding or how aggressive you are. Probably why I never burp mine as I don't do anything serious 😀
Only tires I had issues with on DTS DT's rims are specialized purgatory grid 2bliss 3.0.
Frustrating as i was burping every ride but probably running them on the soft side for snow traction.
I was going to say the same as deadkenny about pressure too low for the intended use and aggressiveness of the terrain and/or riding style, particularly in the Alps.
Beside, a very low pressure doesn't particularly help anything and particularly not lateral grip as it can compromise how well the tyre "knobblies" interact with the ground by generating too much parasite movement of the carcass.
Could just be too lower pressure. I've probably overcompensated with going to bigger tyres. Its comfier for seated technical climbing (in the UK) though ..
After running a bit harder (alps) to try to stave off burps, I was struggling with a pinch flat issue on both Schwalbe apex and Maxxis EXO. Think I'll have to try bontragers SE casing and Spesh GRID and see how they fare. Not sure a double down or supergravity is going to be ever so pedal friendly weight wise especially in a 2.6"
What pressures are you running when you say they are too soft and too hard?
Don't actually know, but probably f/r 15/20 at the softest and 25/35 at the hardest, maybe even harder in the rear. In a 2.6" that's a lot of air to sqaush
Well I've been riding the same rims with 2.5 maxxis around Bourg for the last fortnight with no issues so I'm going to go with user error/too low pressure. I've had one slow puncture that wouldn't seal because the jizz had cooked but a quick top up and everything was fine.
I assume the tyre is definitely seated properly to begin with? I have had tires that have needed to go up to 40psi, maybe more, before they have seated in the rim properly. Obviously once they have seated you lower the pressure again...
more air